Patents by Inventor Sten-.ANG.ke Brannvall

Sten-.ANG.ke Brannvall has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for heat treatment of steel, and products of steel
    Patent number: 5783000
    Abstract: A method for heat-treating steel, primarily strip-like or rod-like steel material, such as steel strip, steel sheet, steel rod or steel wire which have been rolled and heated in an oven or furnace to a surface temperature above about 900 degrees C. and thereafter cooled and optionally treated in an electrolyte bath and/or acid bath. The oven burners are fired with a liquid or a gaseous fuel which is burned with the aid of a gas that contains at least 85 percent by volume oxygen and at most 10 percent by volume nitrogen.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: July 21, 1998
    Assignees: AGA Aktiebolag, Avesta Sheffield Aktiebolag
    Inventors: Carl-Lennart Axelsson, Sten Ljungars, Lars Folke Saltin, Sven-Eric Lunner, Sten-.ANG.ke Brannvall